Cost of formula?!

Celeste • Pregnant with baby #1 EDD April 3rd, 2016!
I tried breast feeding and it didn't work out, I was too overwhelmed as a FTM. Next child I have I will breastfeed just because of the cost alone. My two week old is going through a $25 container of formula every week to week and a half! Any tips on how to save money on formula?